Oil-well pump.



ruff/snee.

' which the following is a full, clear, and exdriving the oil from the well.

act description.

My invention relates to oil-well pumpsn wherein the gas in the well is utilized for Theobject ofthe invention is rto provide a'simple, inexpensive, valveless pump which is automatic in its action and which `will recuire little or no attention, as there are no parts apt to get out of order.

With-thenbove and other objects in View,

the nature-ot which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement ci parts as herein fully described, illustrated and claimed in the accompanying drawing, .forming part of the up of reference -rindicate corresponding parts in the View, `1which is a longitudinal cross section of a well equipped with.' a pump embodying my invention.

The Agas present in an oil well, it at a suilicient pressure, will force the llquid out of the well; but when the pressure of the hydrostatic column of the liquid inthe well is greater than the pressure of thegas where it enters the well, the gus will only Araise the column ol? liquid to a certain height and be unable to :force the same out; and the gas will filter little by `little through the liquid column out of the well.

The purpose of my invention is tov utilize the gas which is unable to force the liquid column out of the welhso that a. smaller column of liquid will he forced by said gas out of the well, although it is normally unable to force the hydrostatic head above 'the gas entrance out.

Referring to the drawings, 1 represents an oil Well into which a well casing 2 is in- V sei-ted, the foot oi which casing rests above the gas stretum which superposes the oil stratum. 'The gas coming from the gas sands is normally unable to raise the column of lieu-id 3 resting above the gas sand out of. the casing 2, although it might raise it to a certain height within the casing. To cause su. the ,as c 1 ningV from the gas sand to sirenes oneness sususfrus normen, or einsenden,

Specification of Letters llstcnt. application inea January ec, 191e. semi up. eeen.

.plicatiom similar characters oni-wuts einer.

Patenten uur. iedere.

drive the liquid present in the well casing therefrom, lxprovide a pump V which con-` sists of agus bell 4, in the shape of a tube of a diameter'slightly less than the diameter of the casing 2.Y The length of the gas bell `will vary according,y to the depth of the well and the height ot' the liquid column .present in the .vellcasing. The lower end of the gas bell is openand is brought to a level with'the toot of the casing 2, that is, substantially to the level` of the gas stratum.

The upper 'end of the gas bell is closed by a plug, which plug has a central aperture threaded at its extremities. portion -of the bore of the plug located with-` in the gas bell receives a tube 6 which eX` tends through the entire length of the gas bell and out of the same into'the 'oil stratum, whelteat said tube isprovided vwith pei-fora tions'giving access tothe oil from the stratum! The other threaded portion of the The threaded V bore of the plug 5 receives a tube 7 which projects through the head 8 of the casing 2 und is directed to a reservoir 9. The tube 6 is also provided withan aperture 10 whichv is located wit-hin the gas bell 4l and adjacent the plug 5.

' lVhen my pump is lowered into' a well,l the 'gas willaccumulate in the gas bell vuntil itis full. The oil in the well casing 2 will be at the samedevel as the oil in the tube 7. The gas present in the bell 1will be at a pressure vequal to the gas pressure at the foot ci the bell. The gas pressure at the foot of the bell' is equal tothe gas pressure in the gas stratum plus the hydrostatic column between the opening l0 and the foot of 6; and, again, as the gasin the bell reaches a pressure. higher than the column of-liquid above it, it will drive the same out from the gas pressure within the bell 4 will cause apulsation of liuid from the tube 7,v into the reservoir 9. he sequence of pulsations of liquid will Var in accordancel'with the restablishment o .pressure withiitvthegas bell 4. That is to say, it will depend n\how `ltube 7. This intermittent rise and fall of fast the gas sand can replace the gas which force out the hydrostatic column located above the opening lO within the tube 7 and if the supply of gas is large, the pulsations will be continuous and asubstantially continuous flow of oil fromthe well through the pipe 7 will result. The fluid in the pipe 6 cannot retract back into the well through the perforation because `the pressure is greater at the perforation than it is at any higher point; consequently, Vthere is vno necessity for using any check valves, thus eliminating the possibility of contrivances whch will easily get out of order.

The casing 2 is preferably provided with an opening 11 to prevent any gas pressure within the casing abovethe liquid column therein. y

From the foregoing description, taken in connection with the accompanying drawing, the advantage of the construction and operation of my device will be readily'v understood by those skilled in the art to which the invention pertains; and while I have describedthe principle of operation, 'together with the structure which I now consider to be the best embodiment thereof, I desire to have it understood -that the pump shown is merely illustrative and that such changes may be magie as are within the scope of the appended claims.

Having thus 'describedv my invention, I claim as new and desire to secure by Let ters Patent:

l. In a .device of the class described, a gas bell, a tube within the bell projecting through thev top thereof and having an opening withinthe bell adjacent theV top of the bell. y

2. In a device of the class described, an elongated gas bell, a tube within the gas bell projecting throughy the lower and upper ends thereof, said tube having an aperture within the bell.

3. In a device of thev class described, a

tube having a closed top, a second tube within the first extending beyond the lower end and through the top of the first tube,

el. In a device of the class described, ay

tube, a plug closing one end of said tube,

a. second tube passing through said plug,

projectingabove the saine and beyond the open end of said first tube, said second tube having perforations at the end projecting beyond the open end of the first tube, and an opening within said first tube adjacent `the plug substantially as and for the purpose set forth. f

5. In a device of the class described, a tube, a plug closing one end of said tube, said plug having a threaded bore, a second tube within said first `tube having one end thereof in *threadedy engagement with the plug, the other end of said second tube projecting out of the open end of the first tube, said projectin .the lateral sur ace thereof, and a third tube .engaging the threaded bore of the plug and forming a continuation of said second tube,

said second tube having an opening adjacent the end in threaded engagement with the threaded bore of the plug substantially as and for the purpose set forth.

end having apertures on.

6. The combination of a well casing having an oil and a gas flow at the lower end and open at the top with a tube closed at the top and. submerged into the oil of the Well, and a second tube within the first extending beyond the lower end into the oil section of the well7 and through the top of the first tube out of the well, said second tube having an opening in proximity to the closed top of the first tube, substantially as and for the purpose set forth.

In testimony whereof I have signed'my name to this specifica-tion inthe presence of tWo subscribing witnesses.

CHARLES AUGUSTUS BUTLER.. 

